Family Cephalobidae

                                 Rev 07/17/2020

Classification:

      Chromadorea
       Chromadoria
       Rhabditida
        Tylenchina
         Cephaloboidea
          Cephalobidae Filpijev, 1934

Morphology and Anatomy:

 

Mountport et al (2000) point out that the suborder Cephalobina (Rhabditida) is significant to basic research on eukaryotic model organisms, including Caenorhabditis elegans because it includes evolutionary progenitors of both plant- and animal-parasitic taxa (Blaxter et al., 1998). However, the taxon is  taxonomic and phylogenetic characteristics of the taxon are not well studied.

Key to subfamilies:
       1. Only cheilorhabdions wider than other parts of stoma                                         Cephalobinae
       2. Cephalic probolae shorter than labial probolae                                                    Acrobelinae
       3. Cephalic probolae large, paddle-shaped, longer than labial probolae.                   Kirjanoviinae
       4. Cheilo- and protostom wider and  the wall more cuticularized than other parts.     Panagrocephalinae
                                     

References

Blaxter, M. L., P. De Ley, J. R. Garey, L. X. Liu, P. Scheldman, A. Vierstraete, J. R. Vanfleteren, L. Y. Mackey, M. Dorris, L. M. Frisse, J. T. Vida, and W. K. Thomas. 1998. A molecular evolution framework for the phylum Nematoda. Nature 392:7175.

Mounport, D., P. Baujard, P. De Ley, M. C. Van de Velde, A. Coomans and J. G. Baldwin. 2000. Ultrastructural variation of cuticular layers in Cephalobinae (Nemata: Rhabditida). J. Nematology 32:13-19.

Nadler, S.A., DeLey, P.,Mundo-Ocampo, M., Smythe, A.B.,Stock, S.P., Bumbarger, D., Adams, B.J., Tandingan De Ley, I., Holovachov, O., Baldwin, J.G. 2006. Phylogeny of Cephalobina (Nematoda): Molecular evidence for recurrent evolution of probolae and incongruence with traditional classifications. Molecular Phylogenetics and Evolution. 40: 696-711.

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